US7083503B2 - Method for sharpening the knife of a rotary trimmer and a rotary trimmer for realizing the method - Google Patents
Method for sharpening the knife of a rotary trimmer and a rotary trimmer for realizing the method Download PDFInfo
- Publication number
- US7083503B2 US7083503B2 US10/927,187 US92718704A US7083503B2 US 7083503 B2 US7083503 B2 US 7083503B2 US 92718704 A US92718704 A US 92718704A US 7083503 B2 US7083503 B2 US 7083503B2
- Authority
- US
- United States
- Prior art keywords
- knife
- sharpening
- trimming
- disk
- rotary trimmer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/368—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades installed as an accessory on another machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/303—With tool sharpener or smoother
Definitions
- the invention relates to a method of sharpening a rotary trimmer knife in the print-processing industry, wherein a first knife with a first bearing forms a first trimming element and, for the trimming operation, operates jointly with a second knife which together with a second bearing forms a second trimming element.
- Rotary trimmers are used in particular in the print-processing industry for trimming the open sides of printed products, for example magazines.
- the printed products are conveyed between two belts in a shingled flow and are trimmed during the flow-through operation.
- the rotary trimmer is provided with an upper knife and a lower knife, also called a counter knife. The shingled flow is trimmed between these two knives, in a manner known per se.
- the upper knife comprises a steel knife holder with hard-metal blades clamped thereto while the lower knife and/or counter knife consists of a steel knife holder onto which a hard metal ring is glued.
- the gap between upper and lower knife should be, for example, in a range of 0.03 to 0.035 mm.
- a precision angular ball bearing arrangement can form the bearings for the two knife shafts.
- An adjusting spindle with vernier is used for adjustment of the lower knife, for which either a bushing or a slide is displaced along a dovetail guide.
- the upper knife is sharpened when the trimming quality diminishes.
- the lower knife experiences little wear because of its geometry.
- the complete trimming element is pulled out of the rotary trimmer for the sharpening and is replaced with a trimming element having sharpened blades.
- the removed trimming element and the replacement trimming element respectively are provided with a knife and ball bearing.
- the removed trimming element is installed in an external sharpening device where the upper knife is sharpened.
- the trimming element with the sharpened upper knife is subsequently reinstalled in the rotary trimmer, whereupon the trimming gap must be readjusted.
- the advantage of this method is a comparably short stop period for the machine and that the geometries between upper knife and lower knife are retained since all components remain inside the trimming element.
- this method has the disadvantage that the user of the rotary trimmer must purchase expensive replacement trimming elements.
- the upper knife only is removed from the rotary trimmer and replaced with an already sharpened upper knife, whereupon the trimming gap is adjusted again and production can resume.
- the upper knife to be sharpened is then sharpened separately in a sharpening unit or at a non-affiliated company.
- the advantage of this method is that the client must purchase only replacement upper knives and not a complete replacement trimming element.
- the disadvantage is a longer stop period of, for example, 10 to 30 minutes since the trimming gap must be re-adjusted following the replacement of the knives.
- inaccuracies during the sharpening operation must be corrected with this method through increasing the trimming gap adjustments, wherein these inaccuracies in particular relate to axial run-out deviation and parallelism.
- a method for sharpening a knife on a rotary trimmer in the print-processing industry wherein the rotary trimmer includes a first trimming element having a first knife and a second trimming element having a second knife which operates jointly with the first knife, the method comprising: removing and replacing one of the first and second knives with a sharpening disk for sharpening the other of the first and second knives; and advancing one of the sharpening disk and the other of the first and second knives during a sharpening operation.
- the trimming gap adjustment can be narrower by 0.01 mm with a knife that is sharpened according to the invention, which corresponds to a reduction by 30%. This effect could not be predicted and is therefore quite surprising.
- the method according to the invention is particularly suitable for sharpening the upper knife.
- the lower knife and/or counter knife can also be sharpened in principle by replacing the upper knife with a sharpening disk.
- the method is particularly suitable for sharpening an upper knife designed as a segment knife, meaning the knife has a plurality of blades mounted on a holder.
- Segmented upper knives of this type are in principle sharpened dry. Since the blades are interrupted because of the segmenting and the area to be sharpened is relatively small, no critical heating up occurs and no cooling is therefore necessary during the sharpening operation.
- a wet sharpening is also possible with the method according to the invention. Of course, a dry sharpening is much simpler since no cooling agent must be supplied.
- the sharpening disk is connected via an endless drive element to the knife to be sharpened, wherein the sharpening disk as well as the knife to be sharpened must be provided with a pulley, in particular with a belt pulley.
- the belt pulleys are designed such that they ensure a suitable translation as well as an optimum sharpening speed. For hard metal, an optimum sharpening speed of 20 to 25 m/s can be achieved.
- a flexible flat belt, in particular, is suitable for use as the drive element.
- a protective cover can be installed easily to ensure the safety or as a protection against dust. Flying sparks are not expected as a result of the small degree of advancement.
- the invention relates furthermore to a rotary trimmer for realizing this method.
- FIG. 1 is a three-dimensional view of a rotary trimmer according to the invention for which the lower knife has been replaced with a sharpening disk.
- FIG. 2 is a front view of the rotary trimmer according to FIG. 1 .
- FIG. 3 is a three-dimensional view of a rotary trimmer according to the invention for which the upper knife has been replaced with a sharpening disk.
- FIG. 4 is a front view of the rotary trimmer according to FIG. 3 .
- the rotary trimmer 1 shown in FIGS. 1 and 2 , comprises a machine frame 2 with therein disposed trimming element 5 that is provided with an upper knife 6 .
- the trimming element 5 has a shaft, not shown herein, driven by a motor 3 which is mounted on the machine frame 2 .
- a drive element, also not shown herein, is arranged below a cover 4 and connects the motor to the shaft of the trimming element 5 .
- the lower end of the machine frame 2 is provided with a fastening plate 13 for a suitable positioning of the rotary trimmer 1 next to a shingled flow and/or a conveying device for such a shingled flow.
- the upper knife 6 is a so-called segmented knife and is provided with a disk-shaped holder 7 , having a plurality of hard metal blades 8 clamped on along the circumference.
- a person skilled in the art will be familiar with upper knives 6 of this type.
- the trimming element 5 is provided with a bearing 16 , which is only indicated in FIG. 2 , in the form of a precision angular ball bearing.
- FIG. 2 shows the axis A 1 for this bearing 16 .
- a belt pulley 9 is mounted on the upper knife 6 and is arranged coaxial to the axis A 1 .
- a drive belt 10 is fitted around this belt pulley 9 , as well as around another belt pulley 11 on a sharpening disk 12 .
- the sharpening disk 12 is mounted on a holder 28 , which normally holds the lower knife 20 of a different trimming element 29 , as shown in FIG. 3 .
- This holder 28 is connected to a shaft, not shown herein, which is positioned on a bearing 17 that is indicated in FIG. 4 .
- the axis A 2 for this shaft extends parallel to the axis A 1 .
- the holder 28 can be adjusted in the directions of axis A 2 with the aid of a rotary knob 18 , provided with a vernier, of an advancing device 19 .
- the adjustment occurs in a manner known per se, in particular with the aid of an adjusting spindle.
- a bushing or slide is displaced for this along a dovetail guide, thus permitting an extremely precise advancement of the sharpening disk 12 along the axis A 2 .
- the sharpening disk 12 has a flat inside surface 15 , the upper region of which can be fitted against the lower region of an inside 14 of the upper knife 6 . If the upper knife 6 is rotated with the aid of motor 3 around the axis A 1 , then the sharpening disk 12 simultaneously rotates around the axis A 2 since the drive belt 10 connects the upper knife 6 to the sharpening disk 12 . The sharpening disk 12 rotates considerably faster then the upper knife 6 since the diameter of belt pulley 11 is considerably smaller than that of belt pulley 9 .
- the transmission ratio is selected to result in an optimum sharpening speed which is in the range of 20 to 25 m/s for the hard metal blades 8 .
- the lower knife 20 is removed from the holder 28 and the sharpening disk 12 fitted onto the holder 28 and connected to this holder, so as to rotate along.
- the belt pulley 11 is already mounted on the sharpening disk 12 .
- the belt pulley 9 is then installed on the upper knife 6 and the drive belt 10 is fitted around the two belt pulleys 9 and 11 .
- a protective cover that is not shown herein is also installed, which covers in particular the upper knife 6 .
- the motor 3 is subsequently connected for operating the upper knife 6 and the sharpening disk 12 . Based on the aforementioned translation ratio, the relative rotational speed corresponds to the optimum sharpening speed.
- the sharpening disk 12 is subsequently advanced with the aid of rotary knob 18 until the inside surface 15 of the sharpening disk 12 fits against the surfaces of the blades 8 .
- the sharpening time depends on the amount of wear of the blades 8 .
- the sharpening disk 12 is advanced about 1/100 mm and the subsequent sharpening operation lasts approximately one minute. This operation is repeated until all blades 8 exhibit the required quality. Following the last forward movement, for example, a 10-minute final sharpening must take place.
- the sharpening disk 12 is again replaced with the lower knife 20 .
- the drive belt 10 and the two belt pulleys 9 and 11 are removed for this operation.
- the rotary trimmer 1 is again ready for production.
- the aforementioned sharpening operation can be dry since the blades are interrupted due to segmenting and no critical heating up occurs.
- a wet sharpening is possible in principle with the aid of a suitable cooling fluid, provided the upper knife 6 is not a segmented knife of this type.
- the sharpening occurs with high precision since the high precision of the trimming element bearings that provides for an adjustment without play is also utilized for the sharpening. An optimally small adjustment of the trimming gap is thus possible even after the sharpening, which permits excellent trimming results.
- the method can also be used for sharpening the lower knife 20 .
- the upper knife 6 is replaced by the sharpening disk 21 shown in FIGS. 3 and 4 .
- the sharpening disk 21 is accordingly driven directly by the motor 3 .
- a belt pulley 23 which is connected via the drive belt 10 to the belt pulley 22 is fitted onto the lower knife 20 .
- the translation ratio is again selected such that an optimum trimming speed results.
- the lower knife 20 to be sharpened comprises a holder 26 onto which a hard metal ring 27 is glued. According to FIG. 4 , this ring 27 has an inside surface 25 against which a flat inside surface 24 of the sharpening disk 21 is fitted during the re-sharpening operation.
- the lower knife 20 is advanced by turning the rotary knob 18 .
- an extremely precise sharpening operation that permits excellent trimming results is possible in this case as well.
- the sharpening disk 21 is removed and is again replaced with the upper knife 6 .
- the belt 10 and the two belt pulleys 22 and 23 are removed as well.
- the motor 3 functions as the drive for sharpening the upper knife 6 as well as the lower knife 20 .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03405621.8 | 2003-08-28 | ||
EP20030405621 EP1510288B1 (de) | 2003-08-28 | 2003-08-28 | Verfahren zum Schleifen der Messer einer Rotationsschneidemaschine sowie Rotationsschneider zur Durchführung des Verfahrens |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050048878A1 US20050048878A1 (en) | 2005-03-03 |
US7083503B2 true US7083503B2 (en) | 2006-08-01 |
Family
ID=34089787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/927,187 Expired - Fee Related US7083503B2 (en) | 2003-08-28 | 2004-08-27 | Method for sharpening the knife of a rotary trimmer and a rotary trimmer for realizing the method |
Country Status (4)
Country | Link |
---|---|
US (1) | US7083503B2 (de) |
EP (1) | EP1510288B1 (de) |
JP (1) | JP4570923B2 (de) |
DE (1) | DE50306512D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090255418A1 (en) * | 2008-04-15 | 2009-10-15 | Rummel Samuel A | Food product slicer with timed sharpening operation |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1637295B1 (de) | 2004-09-20 | 2008-11-05 | Müller Martini Holding AG | Rotationsschneidemaschine mit Verstellvorrichtung zum Einstellen des Schnittspaltes der Messer in Längsrichtung der Messerwellen |
EP1952956A1 (de) | 2007-02-02 | 2008-08-06 | Müller Martini Holding AG | Vorrichtung zum Schneiden eines aus Druckprodukten gebildeten Schuppenstroms |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0450338A1 (de) | 1990-04-02 | 1991-10-09 | Grapha-Holding Ag | Verfahren zum seitlichen Beschneiden von aus Papierbogen bestehenden Druckprodukten |
US5709255A (en) * | 1996-10-18 | 1998-01-20 | Key Knife, Inc. | Chipper with detachable facing knives |
US5941148A (en) * | 1998-01-16 | 1999-08-24 | Tidland Corporation | Automatic slitter blade sharpener |
WO2000069596A1 (en) | 1999-05-12 | 2000-11-23 | Julia Utensili S.R.L. | Sharpening device for disk blades |
DE10135177A1 (de) | 2001-07-19 | 2003-02-06 | Werner Schaefer | Kreismesser mit Diamant- bzw. Bornitrideinlage für Längsschneideeinrichtungen |
US6616515B2 (en) * | 2001-09-17 | 2003-09-09 | David L. Dwyer | Universal jointing attachment for inserted tooth carbide heads |
US6634257B2 (en) * | 2002-01-15 | 2003-10-21 | John W. Long | Sharpening method and apparatus for rotary knives |
US6692424B2 (en) * | 2001-08-01 | 2004-02-17 | Gammerler Corporation | Rotary trimmer apparatus and method |
US6748836B2 (en) * | 1998-01-15 | 2004-06-15 | Gerber Technology, Inc. | Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials |
US6752052B2 (en) * | 2001-10-30 | 2004-06-22 | Delaware Capital Formation, Inc. | Cutter assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS516385B1 (de) * | 1968-12-05 | 1976-02-27 | ||
JPS508184A (de) * | 1973-05-28 | 1975-01-28 | ||
JPH03160462A (ja) * | 1989-11-17 | 1991-07-10 | Mita Ind Co Ltd | マゼンタ感光性トナー |
JP2888617B2 (ja) * | 1990-08-07 | 1999-05-10 | ユジナージュ モンタージュ エ アシスタンス テクニーク ユー エム ア テ | 回転切断装置 |
-
2003
- 2003-08-28 EP EP20030405621 patent/EP1510288B1/de not_active Expired - Lifetime
- 2003-08-28 DE DE50306512T patent/DE50306512D1/de not_active Expired - Lifetime
-
2004
- 2004-08-26 JP JP2004247617A patent/JP4570923B2/ja not_active Expired - Fee Related
- 2004-08-27 US US10/927,187 patent/US7083503B2/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0450338A1 (de) | 1990-04-02 | 1991-10-09 | Grapha-Holding Ag | Verfahren zum seitlichen Beschneiden von aus Papierbogen bestehenden Druckprodukten |
US5709255A (en) * | 1996-10-18 | 1998-01-20 | Key Knife, Inc. | Chipper with detachable facing knives |
US6748836B2 (en) * | 1998-01-15 | 2004-06-15 | Gerber Technology, Inc. | Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials |
US5941148A (en) * | 1998-01-16 | 1999-08-24 | Tidland Corporation | Automatic slitter blade sharpener |
WO2000069596A1 (en) | 1999-05-12 | 2000-11-23 | Julia Utensili S.R.L. | Sharpening device for disk blades |
DE10135177A1 (de) | 2001-07-19 | 2003-02-06 | Werner Schaefer | Kreismesser mit Diamant- bzw. Bornitrideinlage für Längsschneideeinrichtungen |
US6692424B2 (en) * | 2001-08-01 | 2004-02-17 | Gammerler Corporation | Rotary trimmer apparatus and method |
US6616515B2 (en) * | 2001-09-17 | 2003-09-09 | David L. Dwyer | Universal jointing attachment for inserted tooth carbide heads |
US6752052B2 (en) * | 2001-10-30 | 2004-06-22 | Delaware Capital Formation, Inc. | Cutter assembly |
US6634257B2 (en) * | 2002-01-15 | 2003-10-21 | John W. Long | Sharpening method and apparatus for rotary knives |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090255418A1 (en) * | 2008-04-15 | 2009-10-15 | Rummel Samuel A | Food product slicer with timed sharpening operation |
US8220383B2 (en) * | 2008-04-15 | 2012-07-17 | Premark Feg L.L.C. | Food product slicer with timed sharpening operation |
Also Published As
Publication number | Publication date |
---|---|
EP1510288A1 (de) | 2005-03-02 |
DE50306512D1 (de) | 2007-03-29 |
EP1510288B1 (de) | 2007-02-14 |
JP4570923B2 (ja) | 2010-10-27 |
US20050048878A1 (en) | 2005-03-03 |
JP2005074624A (ja) | 2005-03-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MULLER MARTINI HOLDING AG, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SOMMER, REMO;REEL/FRAME:015739/0100 Effective date: 20040823 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20140801 |